.login-container{
    height: calc(100% - 50px);
    /*这三个样式为了让dialog垂直居中*/
    display: flex;
    justify-content: center;
    align-items: center;
}
.dialog{
    background-color: rgba(255,255,255,0.8);
    width: 400px;
    height: 300px;
    border-radius: 25px;
}
.dialog h3{
    font-size: 20px;
    text-align: center;
    padding: 40px 0;
}
.dialog .row{
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
}
.dialog .row span{
    width: 80px;
}
#username,#password{
    height: 40px;
    width: 200px;
    font-size: 18px;
    padding: 5px;
}
#login-button{
    width: 260px;
    height: 40px;
    border-radius: 10px;
    background-color: orange;
    color: white;
    border: none;
}
#login-button:active{
    background-color: gray;
}